we'll take a look at both sides with the obama campaign and the romney campaign coming up in half an hour at 5:30. mike, andrea? >> kristin fisher outside the white house. thank you. >>> another person in the washington area has died from west nile virus. virginia's health department confirmed a second death in northern virginia. the victim only described as an adult who lived in fairfax county. one person in d.c. has died from it as well d maryland has reported three cases of west nile deaths. >>> operations appear to be back to normal at disul less enter -- at dulles international airport after security officials is investigated a bomb threat around 9:00 last night. the united terminal was closed for a while. the daily parking garages were swept by authorities. no bombs were found. the flights were operational by 10:45 and the all clear was given by 11715. >>> -- by 11:15. >>> the national zoo panda's team has few clues to go on in the death of the panda cub. the cub's body showed no signs of being smothered or crushed by its mother but preliminary tests did turn up fluid in the cu